Residential delivery area · Minnesota
ZIP Code 55042: Lake Elmo, MN
ZIP code 55042 is in Lake Elmo, Minnesota, entirely in Washington County (Census 2020 ZIP-county file). About 14,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $154,341 (Census Bureau, ACS 2020-2024). By Census place, 89% of its land lies in Lake Elmo; 11% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Lake Elmo · its only residential ZIP
- County
- Washington County
- Census places
- Lake Elmo
- Metro area
- Minneapolis-St. Paul-Bloomington, MN-WI
- House district
- MN-4 119th Congress
- State
- Minnesota
- Time zone
- Central
- Land area
- 24.9 sq mi · 551 people per sq mi
Where is ZIP code 55042?
55042 centers on 44.988°, -92.892° and covers 24.9 square miles of land plus 2.1 of water. It borders 6 ZIP codes: 55128, 55125, 55115, 55082, 55001, 55129.
The map draws ZIP code areas only. For the streets inside 55042, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 55042 compare with the rest of Washington County?
| Measure | 55042 | In Washington County | In MN |
|---|---|---|---|
| People (ACS 2020-2024) | 13,705 | 10th of 19 | 145th of 881 |
| Median household income | $154k | 1st of 16 | 12th of 545 |
| Median home value | $602k | 2nd of 18 | 11th of 558 |
Its median household income is higher than in 97% of U.S. residential ZIP codes, and it is denser than 73% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 55042?
The 2020 Census counted 12,044 people in 55042; the ACS, which samples households over 2020-2024, estimates 13,705. Between the 2010 and 2020 censuses its population grew 36.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 13,705
- 2020 Census count
- 12,044+36.2% since 2010 (8,840)
- Households
- 4,921
- Median age
- 41.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 55042?
Of the 13,705 people the ACS estimates in 55042, 26.4% are under 18 and 16.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (87.1%).
- Under 1826.4%
- 18 to 6456.9%
- 65 and older16.6%
- White, not Hispanic87.1%
- Other or two or more4.9%
- Asian, not Hispanic3.1%
- Hispanic or Latino2.7%
- Black, not Hispanic2.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 55042 earn?
Median household income is $154,341 (ACS 2020-2024), the highest of the 16 ranked ZIP codes in Washington County. It is not measurably different from 2015-2019 ($147,501 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $154,341
- Income per person
- $77,247
- Below the poverty line
- 4.6%
- Unemployed (of the labor force)
- 2.2%
- Adults 25+ with a bachelor's degree
- 61.8%
- Adjusted gross income per tax return, 2022
- $162,4847,290 returns; wages 66% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 55042?
FHFA's house price index for 55042, built from repeat sales and appraisals of the same homes, rose 56% from 2015 to 2025 and rose 33% from 2020 to 2025, and moved −1.9% in 2025.
- Median home value (owners' estimate)
- $602,100
- Median gross rent
- $2,407
- Homes owned by their occupants
- 93.8%
- Housing units
- 5,104
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 55042?
375 business establishments had a location in this ZIP code in 2023, 51 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services74
- Finance and insurance53
- Construction42
- Health care and social assistance41
- Real estate and rental and leasing28
- Other services (except public administration)27
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 55042?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 55128 | Saint Paul | 29,384 | $93k | 3.5 mi |
| 55125 | Saint Paul | 44,185 | $119k | 5.3 mi |
| 55115 | Saint Paul | 8,949 | $124k | 6.1 mi |
| 55082 | Stillwater | 36,277 | $115k | 6.4 mi |
| 55001 | Afton | 3,027 | $134k | 7.1 mi |
| 55129 | Saint Paul | 34,120 | $144k | 7.2 mi |
| 55090 | Willernie | 401 | $85k | 5.5 mi (near) |
| 55003 | Bayport | 3,905 | $126k | 5.7 mi (near) |
| 55119 | Saint Paul | 44,567 | $82k | 6.5 mi (near) |
| 55109 | Saint Paul | 33,461 | $87k | 6.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.